Plan a flight · Mon 7:35 am EDT (11:35 UTC)

James M Cox Dayton International to Seattle-Tacoma International DAY → SEA

1,696 nautical miles (1,952 statute miles) northwest on a straight line, true course 298°, about 304° magnetic at the departure end (variation 6W). At 120 knots that is 15 h 17 min at the quickest height in today's winds (4,500 ft, a 9-knot headwind), arriving about 7:52 pm PDT (02:52 UTC), after sunset at the destination. Right now DAY is low IFR, wind from the south-southwest (210°) at 5 knots; SEA is VFR, wind from the southeast (130°) at 6 knots. For planning, not a briefing: the legal preflight briefing comes from Flight Service (1-800-WX-BRIEF) or the FAA's own tools. Airlines fly this pair: 2 flights in the DOT's last twelve reported months, the route's page.

The route the straight line, the warnings crossed, restrictions, pilot reports and the airports along the way · click a mark for its words

Green, blue, red and purple airport dots are the flying conditions reported there now (VFR, marginal VFR, IFR, low IFR); grey means no report. Red areas are SIGMETs, orange areas AIRMETs, hatched red areas temporary flight restrictions. Map tiles: OpenFreeMap, data © OpenStreetMap contributors.

Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of

SIGMET C17C: thunderstorms (a convective SIGMET) up to 36,000 ft, moving from the southwest at 40 knots, until 8:55 am EDT (12:55 UTC). Over the route from 778 to 838 nm out.
as issued
```
WSUS32 KKCI 121055
MKCC WST 121055
CONVECTIVE SIGMET 17C
VALID UNTIL 1255Z
SD ND
FROM 20NW BIS-60E BIS-20WNW PIR-20SW DPR-20NW BIS
AREA TS MOV FROM 22040KT. TOPS TO FL360.
```
AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the first 100 nm of the route.
AIRMET TANGO 2W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the route from 349 to 489 nm out.
AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 589 to 1327 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 968 to 1068 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 1078 to 1507 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1118 to 1487 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 1337 to 1667 nm out.

A SIGMET warns of weather hazardous to all aircraft; an AIRMET of weather that matters to small aircraft and to flying without instruments. "From 60 to 180 nm out" is measured along the route from DAY.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

CRJ7 at 3,000 ft, 0 nm north, 6:08 am EDT (10:08 UTC): a routine report with nothing remarked on. At the departure end, 0 nm north of the line.
as filed, and in English
```
CMH UA /OV DAY/TM 1008/FL030/TP CRJ7/SK TOP015
```
Report
a routine report filed through CMH
Where
over DAY
Time
10:08 UTC
Height
at 3,000 ft
Aircraft
CRJ7
Sky
TOP015
F2TH at 40,000 ft, 28 nm northeast, 7:06 am EDT (11:06 UTC): no turbulence. At the departure end, 28 nm northeast of the line.
as filed, and in English
```
FWA UA /OV FWA170012/TM 1106/FL400/TP F2TH/TB NEG
```
Report
a routine report filed through FWA
Where
12 nm south (170°) of FWA
Time
11:06 UTC
Height
at 40,000 ft
Aircraft
F2TH
Turbulence
none
A321 at 34,000 ft, 36 nm northeast, 7:20 am EDT (11:20 UTC): no turbulence. 70 nm along the route, 36 nm northeast of the line.
as filed, and in English
```
FWA UA /OV FWA/TM 1120/FL340/TP A321/TB NEG
```
Report
a routine report filed through FWA
Where
over FWA
Time
11:20 UTC
Height
at 34,000 ft
Aircraft
A321
Turbulence
none
CRJ2 at 5,500 ft, 36 nm northeast, 5:45 am EDT (09:45 UTC): mist. 70 nm along the route, 36 nm northeast of the line.
as filed, and in English
```
FWA UA /OV FWA/TM 0945/FL055/TP CRJ2/WX MIST
```
Report
a routine report filed through FWA
Where
over FWA
Time
09:45 UTC
Height
at 5,500 ft
Aircraft
CRJ2
Weather
shallow st
E75S at 24,000 ft, 4 nm southeast, 7:07 am EDT (11:07 UTC): light chop turbulence from 24,000 ft to 25,000 ft. 80 nm along the route, 4 nm southeast of the line.
as filed, and in English
```
MZZ UA /OV MZZ/TM 1107/FL240/TP E75S/TB OCNL LGT CHOP 250-240
```
Report
a routine report filed through MZZ
Where
over MZZ
Time
11:07 UTC
Height
at 24,000 ft
Aircraft
E75S
Turbulence
occasional light chop from 25,000 ft to 24,000 ft
B38M at 32,000 ft, 13 nm southwest, 7:03 am EDT (11:03 UTC): light turbulence. 80 nm along the route, 13 nm southwest of the line.
as filed, and in English
```
MZZ UA /OV MZZ240015/TM 1103/FL320/TP B38M/TB CONS LGT
```
Report
a routine report filed through MZZ
Where
15 nm southwest (240°) of MZZ
Time
11:03 UTC
Height
at 32,000 ft
Aircraft
B38M
Turbulence
continuous light
B39M at 34,000 ft, 12 nm northeast, 7:23 am EDT (11:23 UTC): no turbulence. 90 nm along the route, 12 nm northeast of the line.
as filed, and in English
```
GUS UA /OV IWH/TM 1123/FL340/TP B39M/TB NEG
```
Report
a routine report filed through GUS
Where
over IWH
Time
11:23 UTC
Height
at 34,000 ft
Aircraft
B39M
Turbulence
none
A320 at 36,000 ft, 48 nm northeast, 7:25 am EDT (11:25 UTC): no turbulence. 120 nm along the route, 48 nm northeast of the line.
as filed, and in English
```
GSH UA /OV GSH/TM 1125/FL360/TP A320/TB NEG
```
Report
a routine report filed through GSH
Where
over GSH
Time
11:25 UTC
Height
at 36,000 ft
Aircraft
A320
Turbulence
none
A21N at 31,000 ft, 25 nm southwest, 6:33 am EDT (10:33 UTC): no turbulence, remarks: during the climb. 130 nm along the route, 25 nm southwest of the line.
as filed, and in English
```
LAF UA /OV BVT/TM 1033/FL310/TP A21N/TB NEG/RM DURC
```
Report
a routine report filed through LAF
Where
over BVT
Time
10:33 UTC
Height
at 31,000 ft
Aircraft
A21N
Turbulence
none
Remarks
during the climb
CRJ9 at 38,000 ft, 25 nm northeast, 7:06 am EDT (11:06 UTC): no turbulence. 140 nm along the route, 25 nm northeast of the line.
as filed, and in English
```
OXI UA /OV OXI/TM 1106/FL380/TP CRJ9/TB NEG
```
Report
a routine report filed through OXI
Where
over OXI
Time
11:06 UTC
Height
at 38,000 ft
Aircraft
CRJ9
Turbulence
none

Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 UTC · at 120 knots true airspeed

The westbound cruising heights for this course (VFR: even thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 17 forecast points nearest it (FWA, JOT, DBQ, MCW, FSD, ABR, PIR, RAP, DIK, MLS, BIL, GTF, GPI, LWS, GEG, YKM, SEA). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
4,500 ft	260° at 12 kt	+9 kt	4 °C	111 kt	15 h 17 min	7:52 pm PDT (02:52 UTC)
6,500 ft	260° at 11 kt	+9 kt	9 °C	111 kt	15 h 17 min	7:52 pm PDT (02:52 UTC)
8,500 ft	250° at 12 kt	+9 kt	7 °C	111 kt	15 h 17 min	7:52 pm PDT (02:52 UTC)
10,500 ft	250° at 14 kt	+10 kt	2 °C	110 kt	15 h 25 min	8:00 pm PDT (03:00 UTC)
12,500 ft	250° at 16 kt	+12 kt	-1 °C	108 kt	15 h 42 min	8:17 pm PDT (03:17 UTC)
14,500 ft	250° at 16 kt	+11 kt	-5 °C	109 kt	15 h 34 min	8:09 pm PDT (03:09 UTC)
16,500 ft	250° at 16 kt	+11 kt	-9 °C	109 kt	15 h 34 min	8:09 pm PDT (03:09 UTC)
18,000 ft FL180	240° at 16 kt	+11 kt	-12 °C	109 kt	15 h 34 min	8:09 pm PDT (03:09 UTC)
24,000 ft FL240	240° at 24 kt	+16 kt	-24 °C	104 kt	16 h 18 min	8:53 pm PDT (03:53 UTC)
30,000 ft FL300	250° at 28 kt	+22 kt	-35 °C	98 kt	17 h 18 min	9:53 pm PDT (04:53 UTC)
34,000 ft FL340	250° at 37 kt	+31 kt	-39 °C	89 kt	19 h 03 min	11:38 pm PDT (06:38 UTC)
39,000 ft FL390	260° at 47 kt	+43 kt	-46 °C	77 kt	22 h 02 min	2:37 am PDT (09:37 UTC)

Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 UTC; temperatures above 24,000 ft are below zero. Heights are above sea level; a height is left out when the forecast has no wind for it over most of the line (the ground is higher). Ground speed is the airspeed less the headwind; the time en route is for the straight line and ignores climb, descent and routing around weather.

The forecast points as issued

Point	From	3,000	6,000	9,000	12,000	18,000	24,000	30,000	34,000	39,000
FWA	used from 0 nm out; 58 nm from the line	270/20	300/16 15°	290/14 10°	280/17 3°	290/25 -7°	280/30 -19°	280/34 -35°	290/48 -44°	300/64 -52°
JOT	used from 150 nm out; 30 nm from the line	250/25	260/22 14°	250/17 9°	270/21 5°	280/28 -8°	280/36 -20°	270/41 -35°	280/57 -42°	290/65 -50°
DBQ	used from 249 nm out; 55 nm from the line	250/27	260/23 17°	240/26 10°	260/30 4°	280/26 -9°	280/36 -21°	270/41 -36°	280/52 -41°	290/67 -48°
MCW	used from 399 nm out; 29 nm from the line	250/36	250/24 19°	240/26 11°	250/30 5°	270/22 -9°	260/30 -21°	260/31 -36°	280/53 -38°	280/66 -48°
FSD	used from 549 nm out; 39 nm from the line	210/20	230/23 21°	220/25 14°	230/30 5°	230/26 -9°	240/30 -21°	270/33 -36°	260/47 -37°	270/58 -47°
ABR	used from 649 nm out; 64 nm from the line	080/12	210/12 17°	220/22 12°	230/26 5°	220/28 -10°	230/41 -21°	250/36 -36°	260/47 -39°	260/63 -47°
PIR	used from 699 nm out; 49 nm from the line		230/15 15°	220/22 14°	220/24 6°	200/32 -10°	210/48 -22°	240/45 -33°	240/43 -37°	250/55 -46°
RAP	used from 848 nm out; 83 nm from the line		250/28 16°	260/31 10°	240/25 4°	210/35 -10°	200/45 -23°	230/47 -31°	230/47 -36°	230/51 -46°
DIK	used from 898 nm out; 81 nm from the line		190/12 5°	230/29 7°	220/33 1°	220/43 -11°	210/47 -23°	220/53 -33°	240/56 -40°	250/72 -47°
MLS	used from 948 nm out; 55 nm from the line		290/17 -1°	250/18 0°	230/25 0°	220/31 -11°	220/32 -24°	220/50 -32°	220/60 -38°	230/71 -46°
BIL	used from 1098 nm out; 34 nm from the line		300/14	270/19 -2°	260/26 -2°	220/28 -13°	210/51 -25°	220/56 -33°	220/61 -39°	220/72 -45°
GTF	used from 1197 nm out; 54 nm from the line		L/V	L/V -7°	240/8 -8°	240/30 -14°	240/40 -28°	210/52 -38°	210/76 -38°	220/72 -43°
GPI	used from 1347 nm out; 76 nm from the line		090/8 -4°	140/7 -7°	090/10 -8°	110/10 -19°	210/25 -30°	200/24 -40°	210/31 -39°	210/35 -42°
LWS	used from 1397 nm out; 75 nm from the line	L/V	340/5 -3°	L/V -6°	040/7 -10°	100/23 -22°	180/30 -31°	190/11 -34°	200/11 -36°	220/23 -40°
GEG	used from 1447 nm out; 38 nm from the line		060/7 -2°	070/12 -6°	050/8 -8°	120/11 -21°	110/18 -33°	030/22 -37°	040/6 -38°	240/7 -41°
YKM	used from 1597 nm out; 50 nm from the line	360/6	360/11 -1°	030/20 -7°	040/21 -11°	020/55 -18°	010/84 -26°	010/79 -40°	010/45 -42°	350/23 -42°
SEA	used from 1647 nm out; 25 nm from the line	350/5	010/6 0°	010/9 -4°	010/27 -6°	010/51 -15°	360/58 -26°	360/60 -41°	350/55 -48°	340/30 -45°

The weather now: both ends and the airports along the way public airports with a weather report within 25 nm of the line, one for each stretch

Airport	Where	Conditions	Wind	Visibility	Ceiling	Elevation	Reported
DAY Dayton, OH	departure	low IFR Sky: sky obscured at 200 feet Weather: fog	from the south-southwest (210°) at 5 knots	0.25 mi	200 ft	1,009 ft	6:56 am EDT (10:56 UTC)
GUS Peru, IN	100 nm out, 1 nm south of the line, tower	VFR	from the south (180°) at 5 knots	10+ mi	none	810 ft	10:55 UTC
DBQ Dubuque, IA	329 nm out, 6 nm northeast of the line, tower	VFR	from the south-southwest (200°) at 8 knots	10+ mi	none	1,076 ft	10:53 UTC
ALO Waterloo, IA	399 nm out, 16 nm southwest of the line, tower	VFR	from the south (170°) at 5 knots	10+ mi	none	873 ft	10:54 UTC
MJQ Jackson, MN	529 nm out, 4 nm north of the line	VFR	calm	10+ mi	none	1,445 ft	11:15 UTC
HON Huron, SD	679 nm out, 3 nm south of the line	low IFR Sky: overcast at 200 feet Weather: mist	from the north-northwest (340°) at 8 knots	2.5 mi	200 ft	1,288 ft	11:16 UTC
RPX Roundup, MT	1128 nm out, 5 nm north of the line	no report just now				3,490 ft
MSO Missoula, MT	1357 nm out, 7 nm southwest of the line, tower	VFR Sky: a broken layer at 6,500 feet, overcast at 11,000 feet	from the east (090°) at 7 knots	10+ mi	6,500 ft	3,205 ft	10:53 UTC
GEG Spokane, WA	1507 nm out, 21 nm north of the line, tower	VFR Sky: a few clouds at 5,000 feet, scattered clouds at 8,500 feet, a broken layer at 10,000 feet	from the northeast (040°) at 6 knots	10+ mi	10,000 ft	2,385 ft	10:53 UTC
MWH Moses Lake, WA	1577 nm out, 10 nm south of the line, tower	VFR	from the north-northwest (340°) at 6 knots	10+ mi	none	1,188 ft	10:52 UTC
SEA Seattle, WA	destination	VFR	from the southeast (130°) at 6 knots	10+ mi	none	432 ft	3:53 am PDT (10:53 UTC)

The highest airport on this list sits at 3,490 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SEA when you get there the forecast at the estimated arrival, 7:52 pm PDT (02:52 UTC)

Wind from the west at 6 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for SEA

From Mon 5:00 am PDT (12:00 UTC): wind from the southeast at 5 knots, visibility more than 6 miles, clear skies
From Mon 9:00 am PDT (16:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
From Mon 11:00 am PDT (18:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Tue 4:00 am PDT (11:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, overcast at 10,000 feet

The forecast for DAY, the departure

From Mon 8:00 am EDT (12:00 UTC): wind from the west-southwest at 3 knots, visibility ½ mile, fog, overcast at 200 feet
From Mon 9:00 am EDT (13:00 UTC): wind from the southwest at 6 knots, visibility 3 miles, mist, scattered clouds at 200 feet
At times between Mon 9:00 am EDT (13:00 UTC) and 10:00 am EDT (14:00 UTC): visibility 1 mile, mist, overcast at 200 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the south-southwest at 11 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 8:00 pm EDT (00:00 UTC): wind from the south-southwest at 10 knots, visibility more than 6 miles, scattered clouds at 10,000 feet, a broken layer at 25,000 feet

Temporary flight restrictions on the line or within 25 nm of it

6/8927 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 1337 nm along the route · a VIP movement · starts Wednesday 14 October · ZSE
6/8923 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 1337 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC

Daylight

Sunset at DAY 7:02 pm EDT (23:02 UTC), at SEA 6:25 pm PDT (01:25 UTC) (civil twilight ends 6:56 pm PDT (01:56 UTC)). At 120 knots the arrival at SEA is after sunset there (6:27 pm PDT (01:27 UTC)).

Each restriction opens the FAA's own page with the exact area, heights and times. Ordinary notices to air missions (closed runways, lights out) are not shown: the FAA's notice search is not open to sites like this one at this time.

Radar and forecast charts for the regions crossed government pictures, the latest each time the page loads

Radar now, the central Great Lakes · loop National Weather Service

Radar now, the upper Mississippi valley · loop National Weather Service

Radar now, the northern Rockies · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

Sources: the Aviation Weather Center's data service (SIGMETs, AIRMETs, graphical AIRMETs, pilot reports, winds and temperatures aloft, observations and terminal forecasts), the National Weather Service radar, the Weather Prediction Center's charts, the FAA's temporary flight restriction list and shapes, and the FAA's airport file for the positions, elevations and magnetic variation. Fetched when the page is viewed and kept a few minutes. Each leg is the straight line between its two airports; airways, terrain and airspace are not considered. The airports in detail: James M Cox Dayton International, Seattle-Tacoma International.